Calcium chloride (CaCl2) has a formula mass of 110.98 g/mol. a) What is the molarity of CaCl2 in a solution prepared by dissolving 5.00 mg CaCl2 in enough water to make 0.900 L of solution? What is the molarity of Ca2+? What is the molarity of Cl−? b) How many grams of CaCl2 would be required to make 250.0 mL of 0.625 M CaCl2? c) An aqueous solution contains 15.2 ppm of dissolved CaCl2. Assuming the density of the solution is 1.00 g/mL, what is the concentration of Cl− in ppm?
Calcium chloride (CaCl2) has a formula mass of 110.98 g/mol.
a) What is the molarity of CaCl2 in a solution prepared by dissolving 5.00 mg CaCl2 in enough water
to make 0.900 L of solution? What is the molarity of Ca2+? What is the molarity of Cl−?
b) How many grams of CaCl2 would be required to make 250.0 mL of 0.625 M CaCl2?
c) An aqueous solution contains 15.2 ppm of dissolved CaCl2. Assuming the density of the solution is
1.00 g/mL, what is the concentration of Cl− in ppm?
d) A 1.00-g sample of NaCl (FM 58.44) and a 0.500-g sample of CaCl2 are mixed together, dissolved in
water, and diluted to a final volume of 100.0 mL. Then 20.00 mL of this solution is pipetted into a
separate flask and diluted to a final volume of 50.00 mL. What is the molarity of chloride ion in this
new solution?
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